[ttml2] Pull Request: apply patch from ttml1/#304

cconcolato has just submitted a new pull request for https://github.com/w3c/ttml2:

== apply patch from ttml1/#304 ==
Partially addresses #358 

See https://github.com/w3c/ttml2/pull/579

Received on Thursday, 18 January 2018 23:56:39 UTC